8678631617 has 2 divisors, whose sum is σ = 8678631618. Its totient is φ = 8678631616.

The previous prime is 8678631593. The next prime is 8678631671. The reversal of 8678631617 is 7161368768.

Together with next prime (8678631671) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6205658176 + 2472973441 = 78776^2 + 49729^2 .

It is a cyclic number.

It is not a de Polignac number, because 8678631617 - 2¹⁰ = 8678630593 is a prime.

It is not a weakly prime, because it can be changed into another prime (8678631677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4339315808 + 4339315809.

It is an arithmetic number, because the mean of its divisors is an integer number (4339315809).

Almost surely, 2^8678631617 is an apocalyptic number.

It is an amenable number.

8678631617 is a deficient number, since it is larger than the sum of its proper divisors (1).

8678631617 is an equidigital number, since it uses as much as digits as its factorization.

8678631617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 53.

The square root of 8678631617 is about 93159.1735525815. The cubic root of 8678631617 is about 2055.0248824940.

The spelling of 8678631617 in words is "eight billion, six hundred seventy-eight million, six hundred thirty-one thousand, six hundred seventeen".